Click to viewMore than one tipster tells us that Patrick Norton is leaving Ziff-Davis's DL.TV, and, after a brief paternity leave, joining Revision3. DL.TV, of course, was the brainchild of Jumpin' Jim Louderback, the former PC Magazine editor who's now Revision3's CEO. And before Ziff-Davis, Louderback and Norton worked together at TechTV, where Norton was the host of the popular "Screen Savers" show — the same show that later birthed Revision3 cofounder Kevin Rose's career. It's not a surprising hire, but it should answer any remaining questions about how crushingly insular the world of online video is.